Aes 加密

在写app接口的时候，用到AES加解密，关于这块有点陌生，稍微了解了一下，这个是ECB加密，每次加密一样，更安全的需要CBC。

namespace app\common\lib;


class Aes
{
    /**
     * 对加密的数据进行加密
     * @param $request
     * @return string
     */
    public function aesEncryptRequest($request)
    {
        $res = $this->encryptPass($request,config('app.aes_key'));
        return $res;
    }

    /**
     * 加密
     * @param array $request
     * @param string $key
     * @return string
     */
    private function encryptPass($request,$key='')
    {
        $size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128,MCRYPT_MODE_ECB);
        $input =$this->pkcs5_pad($request,$size);
        $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128,'',MCRYPT_MODE_ECB,'');
        $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td),MCRYPT_RAND);
        mcrypt_generic_init($td,$key,$iv);
        $data = mcrypt_generic($td,$input);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        $data = base64_encode($data);
        return $data;
    }

    //填充
    private function pkcs5_pad($text,$blockSize)
    {
        $pad = $blockSize - (strlen($text)%$blockSize);
        return $text.str_repeat(chr($pad),$pad);
    }

    /**
     * 对数据进行AES解密
     * @param $data
     * @return bool|string
     */
    public function aesDecryptRequest($data)
    {
        $res = $this->decryptPass($data,config('app.aes_key'));
        return $res;
    }

    /**
     * 解密
     * @param $data
     * @param $key
     * @return bool|string
     */
    private function decryptPass($data,$key)
    {
        $decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128,$key,
            base64_decode($data),
            MCRYPT_MODE_ECB);
        $dec_s = strlen($decrypted);
        $padding = ord($decrypted[$dec_s-1]);
        $decrypted = substr($decrypted,0,-$padding);
        return $decrypted;
    }
}